Advanced Hydrogen and CO 2 Capture Technology for Sour Syngas Air Products and Chemicals, Inc. Jeffrey Hufton, Timothy Golden, Robert Quinn, Jeffrey Kloosterman, Charles Schaffer, Reed Hendershot and Kevin Fogash Air Products PLC Andrew Wright and Vince White Gasification Technology Council Gasification Technology Conference Oct 31 st Nov 3 rd Washington, D.C.
Air Products provides technology to capture CO 2 from fossil-fuel-based processes Hydrogen production from natural gas with CO 2 capture For power generation, vehicle fuels, refinery applications Oxyfuel technology for pulverized coal boilers Amenable to both new-build supercritical power plants and retrofitting the large installed base of existing coal-fired assets CO 2 capture from gasification Integrated CO 2 capture and acid gas removal Advanced separation technology CO 2 technology using membranes, adsorption, absorption and cryogenic systems 2
3 Simplified Gasification Flowsheet for H 2 Production and CO 2 Capture Conventional Route Bulk AGR Polishing CO 2 and H 2 S separated Tailgas philosophy Acid Gas Removal Physical solvents Multi-column, multiflash process Heat integration Minimizing cooling load Manage impurities From Gasifier Water Gas Shift H 2 Tailgas Cooling -40 to 32 F X X X X CO 2 AGR Vent Clean Up X Sulfur Claus Plant H 2 S CO 2 X
4 Air Products' "Sour " Technology for H 2 Production and CO 2 Capture From Gasifier Water Gas Shift Improved route Single step purification Cooling ~100 F Based on existing technology Designed to meet H 2 purity High Purity H 2 Lower purity for power Sulfur slip of < 3 ppmv, can design for ppb applications Reduced capital and operating cost Reduced cooling duty, no chilling or refrigeration CO 2 and H 2 S rejected in tailgas H 2 Sour H 2 S CO 2
Tailgas Disposition and Integration Sour H 2 GTCC ~ ~ Air N 2 HRSG Exhaust H 2 S CO 2 Q Vent SO x NO x CPU CO 2 5 O 2 Combustor HNO 3 H 2 SO 4
Sour Technology Development Passive Adsorbent Testing (EERC) Build Mobile Coal Testing (EERC) Alternative Flowsheet Development Petcoke Testing (EERC) Screening by H 2 S exposure tests Preliminary characterization Selection for additional testing 6
Sour Technology Development Passive Adsorbent Testing (EERC) Build Mobile Coal Testing (EERC) Alternative Flowsheet Development Petcoke Testing (EERC) supported by Flexible arrangement: or TSA Proof of concept on actual syngas Adjust operational parameters Advanced characterization Enabled rapid model development Multiple feedstocks 7
H2S Capacity (mmole/g) H 2 S Capacity Stabilizes 1.2 1 fresh adsorbent 0.8 0.6 0.4 0.2 0 Bed A 1st load Bed B 1st load bed A 2nd load Bed B 2nd load 0 500 1000 1500 Number Cycles 8
Sour Combustor Development Design Basis Oxy-Tailgas burner Leverage off oxy-fuel combustion expertise Single or multiple burners Housed in a fired heater or package boiler Status Designed and tested prototype burners Conducted tests with H 2 S laden stream Stability map established Performance mapping underway 9
CO 2 Purification Unit O 2 Supply Steam Boiler & Turbines CO 2 Transport & Sequestration MW e CO 2 Purification & Compression Vent Oxygen Coal Flue Gas Recycle CPU CO 2 Reactive purification technology HNO 3 H 2 SO 4 High pressure NOx catalyzed oxidation of SO 2 to H 2 SO 4 acid Further purification to remove water and inerts Flowsheets for storage or EOR grade CO 2 applications Originally developed for oxycoal power boiler applications Currently in the pilot phase of development Extended for sour combustion flue gas 10
Techno-Economic Benefits High Purity H 2 Power Case Units Base Sour Base Sour Petcoke Input MT/d 4,000 4,000 4,000 4,000 H 2 Produced knm 3 /hr MMSCFD 305 279 299 273 Power Produced MW net 453 473 % CO 2 Captured ~95% >99% ~90% ~91% Capital Savings Operating Savings Reduction in CO 2 Capture Cost Millions USD$ Millions USD$/yr 106 147 24 2 25.2% 19.7% 11
Summary and Conclusions Air Products is developing a proprietary low-cost CO 2 capture option for pre-combustion systems Applicable to H 2 and power production The technology consists of: H 2 adapted to handle sour syngas Low-BTU oxyfuel burner SO x, NO x, and inert removal system developed by Air Products for oxyfuel coal combustion Potential advantages over the state of the art: Lower capital and operating costs 25 % reduction in the cost of CO 2 capture Feasible to achieve ~100 % CO 2 capture rate 12
Scale-Up Pathway H 2 Product Sour Syngas H 2 S/CO 2 Q H 2 S+CO 2 CO2 O 2 Adsorbent life tests Lab scale Gasifier / Design of pilot plant Calgary, Canada Pilot Grand Forks, ND 13
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